Oscar sciilsrigge



m1 Model.) I Y O. SUHNIGGE.

REGENERATING FURNAGL 8w. N0. 554,499. Patented Feb. 11, 1896.

L IIIIIlIIIIIII/Il! AN DREW B GRAHAM. PHOTO-UTHD WAsm-N GTON. u c

NlTED STATES PATENT OFFICE.

OSCAR SOHNIGGE, OF BERLIN, GERMANY.

REG EN ERATING- FU RNACE, 84.0.

SPECIFICATION forming part of Letters Patent No. 554,499, dated February11, 1896. Application filed fieptember 21, 1895. Serial No. 563,251. (Nomodel.)

To all whom it may concern.-

Be it known that I, OSCAR SOHNIGGE, a subjeot of the German Emperor,residing at Berlin, Germany, have invented certainnew and usefulImprovements in Regenerating-Furnaces with Devices for Ventilation andCirculation Heating; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to certain improvements in the construction ofstoves and furnaces, whereby a thorough combustion of the fuel, as wellas of all smoke and gases arising therefrom, is insured.

My invention further provides for a uniform temperature and perfectventilation of the apartment in which the stove or furnace is located,as will be readily understood from the following description.

Referring to the drawings, Figure 1 is a vertical longitudinal sectionof a stove or furnace embodying my improvements. Fig. 2 is a verticalsection at right angles to Fig. 1, and Fig. 3 is a horizontal section ofsame.

The casing A of the stove or furnace may be made of iron, bricks, tiles,or such other material as is commonly used for said purpose, andprovided with a cornice and such other decorations as fancy may dictate.

The fireplace B is arranged in the lower part of the apparatus and ispartially constructed with double walls and top, the space 0 betweensame forming a passage for the products of combustion, which enter thespace 0 through openings d formed in the lower shell of the furnace-topand which escape therefrom through opening at the lower part of thefurnace rear wall into a flue e, as indicated by arrows at e.

The bottom of the furnace is provided with an ordinary grate F, thefront bearing-bar 7b of which serves as a support for a removable grate2', which is adapted to fill the space between bearing -bar and thefurnace-lining above same.

The bottom of the ash-pit K is provided across its front with a raisedsupport on which rests an open-top water-tank Z for the purpose ofsupplying moisture to the burning fuel.

Fresh air is admitted at the bottom of the grate and to the hollow backof the furnace through the opening m and connecting-conduits 'n o, thesupply of air being regulated by means of a suitable damper connectedwith said opening. The damper shown in the drawings (see Figs. 1 and 3)is composed of a plate 1 having a central screw-stud 2, adapted tooperate in a cross-bar 3 at the front of the draft-opening; the saidplate being provided with a handle 4 by which it is operated as desired.

Access to the interior of the furnace and to the ash-pit thereof is hadthrough doors 5 6, as in other apparatus for a like purpose.

Above the furnace-top and in one of the rear corners of the apparatus isa vertical hotair flue '7, the upper part of which projectshorizontally, as shown at 8, and communicates with the outside through agrating 9.

The upper part of the apparatus is provided at different elevations withhorizontal plates 10, each plate having an opening 11 on one endthereof, and the plates so arranged that the said openings shall be atalternate ends of the compartment.

The apparatus is provided near its top with a smoke-exit pipe 12, andnear its bottom with a side 13, in front of which is a. grating 14. Aflue 15 extending rearwardly through the apparatus is provided with aregulating-damper 16. This flue may terminate within the compartment orbe extended to the outside of the building within which the furnace islocated and there protected by a grating or screen, as indicated at 17in Fig. 3.

To heat the apparatus the grate 2' is first removed and an ordinary woodfire started on the grate F by introducing the kindling through the door6. When the fire is fairly started, the grate 2' is replaced and thedoor closed, after which the coal' is introduced through the door 7. Airin the meantime is admitted through the opening m into the con-- duit n,where it takes up heat and is delivered into the ash-pit, from whence itpasses upward through the grates F andt to the burning fuel. In passingaround the bearing-bar h the air is brought in contact with the watercontained in the tank Z, and in consequence passes to the fire in amoistened state, where,

coming in contact with the incandescent coal, it is decomposed andformsoxycarbon gas and hydrogen.

The products of distillation partly confined in the upper part of thefireplace, being unconsumed and having the form of smoke, pass throughthe openings into the hollow rear wall of the furnace through the space0, after which it descends and combines or mingles with the products ofcombustion, passing from the fireplace through the flue e. The airpassing from opening an through conduit 0 furnishes a great quantity ofoxygen to the gases in the space 0. These gases on meeting the oxycarbonand hydrogen gases coming from the incandescent fuel on the grate areconsumed, producing a bright flame without smoke.

The gases of combustion passing upward in the apparatus are forced totake a zigzag course through the openings, 11 in the plates 10, and indoing so gradually give out their heat, finally escaping through thepipe 12.

In order to derive the greatest amount of heat from the apparatus thatside thereof which contains the hot-air fine 7 should be placed outward,so that the air can freely enter same and thus keep up a constantcirculation in both room and apparatus until the diiference intemperature has been equalized.

Having fully described the construction and operation of my heatingapparatus, what I claim as new, and desire to secure by Letters Patent,is-

1. In a heatingfurnace, a fireplace partially provided with hollow wallsand top, the lower plate of the top, having inlet-openings as describedand an air-flue communicating with the hollow space in the rear wall ofthe furnace, substantially as set forth.

2. The combination in a heating-furnace of a fireplace partially formedof hollow walls and top having inlets and exits for the products ofcombustion as described, the rear hollow wall constituting a mixing-fluewith an adjustable air-opening and conduits for conveying the air, anddischarging same, under the fire-grates and into the said mixingflue,substantially as set forth.

3. In a heating-furnace, the combination of a fireplace having hollowwalls and top, provided with air inlets and exits, as described, withhorizontal plates arranged at diiferent elevations above the fireplace,the said plates provided at alternate ends, with opcnin gs and theapparatus having an outlet smoke-pipe, substantially as set forth.

4. The combination in a heating-furnace of a fireplace having hollowwalls and top, and air inlets and exits to the space within said walls,with a hot-air flue, as described, and grate-opening near the top andbottom of the apparatus whereby a circulation of evenlytempered air issecured, substantially as set forth and for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

OSCAR SGIINIGGE. Vitnesses:

IIERMANN Voss, FRANZ WENDISH.

